68404755 has 16 divisors (see below), whose sum is σ = 112978944. Its totient is φ = 35305440.

The previous prime is 68404741. The next prime is 68404799. The reversal of 68404755 is 55740486.

It is not a de Polignac number, because 68404755 - 2⁷ = 68404627 is a prime.

It is a super-2 number, since 2×68404755² = 9358421013220050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73089 + ... + 74018.

It is an arithmetic number, because the mean of its divisors is an integer number (7061184).

Almost surely, 2^68404755 is an apocalyptic number.

68404755 is a deficient number, since it is larger than the sum of its proper divisors (44574189).

68404755 is a wasteful number, since it uses less digits than its factorization.

68404755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147146.

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 68404755 is about 8270.7167162224. The cubic root of 68404755 is about 408.9737470770.

The spelling of 68404755 in words is "sixty-eight million, four hundred four thousand, seven hundred fifty-five".